
lomené výrazy1
Authored by M Potužáková
Mathematics
9th Grade
Used 36+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hodnota lomeného výrazu pro x = 3
je:3
2
6
10
Answer explanation
Když dosadíme za x, dostaneme a to je 2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Podmínka pro lomený výraz
má tvar
Answer explanation
Sledujeme jmenovatele - tzn
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Podmínka pro lomený výraz
Answer explanation
Zajímá nás pouze jmenovatel, kde platí , což znamená
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lomený výraz
Answer explanation
Sledujeme jmenovatele, což znamená , odtud
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lomený výraz má podmínku
Answer explanation
Jmenovatel musí být různý od nuly, tedy
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Vyber všechny správné odpovědi: součin
se rovná nule, když
Answer explanation
Stačí když A nebo B jsou nulové, tak platí tři odpovědi A = 0 či B = 0 či A =0 a B =0
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pokud součin
má být různý od nulystačí, když
stačí, když
čísla A a B nesmí být opačná (např. -1 a +1)
musí být a zároveň
Answer explanation
Musíme zajistit nenulovost A i B, takže platí a zároveň
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